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  2. List of mathematical constants - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical_constants

    A mathematical constant is a key number whose value is fixed by an unambiguous definition, often referred to by a symbol (e.g., an alphabet letter), or by mathematicians' names to facilitate using it across multiple mathematical problems. [1]

  3. Firing order - Wikipedia

    en.wikipedia.org/wiki/Firing_order

    For this inline-4 engine, 1-3-4-2 could be a valid firing order.. The firing order of an internal combustion engine is the sequence of ignition for the cylinders.. In a spark ignition (e.g. gasoline/petrol) engine, the firing order corresponds to the order in which the spark plugs are operated.

  4. List of physical constants - Wikipedia

    en.wikipedia.org/wiki/List_of_physical_constants

    The constants listed here are known values of physical constants expressed in SI units; that is, physical quantities that are generally believed to be universal in nature and thus are independent of the unit system in which they are measured.

  5. Direct image functor - Wikipedia

    en.wikipedia.org/wiki/Direct_image_functor

    If dealing with sheaves of sets instead of sheaves of abelian groups, the same definition applies. Similarly, if f: (X, O X) → (Y, O Y) is a morphism of ringed spaces, we obtain a direct image functor f ∗: Sh(X,O X) → Sh(Y,O Y) from the category of sheaves of O X-modules to the category of sheaves of O Y-modules.

  6. Helmholtz coil - Wikipedia

    en.wikipedia.org/wiki/Helmholtz_coil

    The eight contours are for field magnitudes of 0.5 B 0, 0.8 B 0, 0.9 B 0, 0.95 B 0, 0.99 B 0, 1.01 B 0, 1.05 B 0, and 1.1 B 0. The calculation of the exact magnetic field at any point in space is mathematically complex and involves the study of Bessel functions.

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  8. Linear recurrence with constant coefficients - Wikipedia

    en.wikipedia.org/wiki/Linear_recurrence_with...

    In mathematics (including combinatorics, linear algebra, and dynamical systems), a linear recurrence with constant coefficients [1]: ch. 17 [2]: ch. 10 (also known as a linear recurrence relation or linear difference equation) sets equal to 0 a polynomial that is linear in the various iterates of a variable—that is, in the values of the elements of a sequence.

  9. FACT CHECK: Video Of Ship Firing Laser Weapon Is AI ... - AOL

    www.aol.com/news/fact-check-video-ship-firing...

    The video is based on an actual image of the USS Preble firing a Helios laser weapon. The image went viral after an open-source intelligence account posted the image on X. ...